The brothers are expected to be sentenced to 50 years apiece in prison when they’re sentenced in May and must register for life as sex offenders.

Investigators say the girls were molested in a converted Fullerton garage where the brothers lived.

“Between May 2010 and August 2011, the defendants are accused of molesting the two little girls while the defendants were together, one after the other, and on their own at separate times,” according to a statement released by the O.C. District Attorney’s Office. “The sexual conduct included touching, masturbation, digital penetration, oral copulation, and showing pornographic images to the victims.”

One of the girls told a family member about the assaults and the brothers were arrested in 2011.